diff --git a/pyproject.toml b/pyproject.toml
index 0e025a3..566aa44 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,8 +4,6 @@ requires = [
   "wheel",
   "conan<2.0.0",
   "scikit-build>=0.11.0",
-  "cmake!=3.17.1,!=3.17.0",
-  "ninja",
   "pybind11>2.6",
   "oldest-supported-numpy; python_version>'3.7' or platform_machine=='aarch64' or platform_python_implementation=='PyPy'",
   "numpy==1.16.3; python_version<='3.7' and platform_machine!='aarch64' or platform_python_implementation=='PyPy'",